NBN ISO 23658:2021

The document specifies a method for evaluating the adhesion of sealants with a minimum elongation
at break of 25 % (according to ISO 8339, Method A or B) on various substrates. This test method can
be used for one-component and multi component sealants. This method is typically used for elastic
sealants but can be also used for plastic sealants. For plastic sealants, the test can be more difficult and
needs to be carried out by experienced technicians.
This test is used to judge the adhesion of construction sealants in combination with cleaners, activators
and/or primers on various substrates when exposed to a peeling force and also after different aging
conditions.
An adhesion test according to this document can also be conducted for process monitoring and quality
assurance accompanying production. The test method described in this document is not intended to
replace any adhesion cohesion test methods specified in ISO 11600.